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Finding the Fourth Proportional to 41.78, 62.64 and 26.66

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Solution

The fourth proportional to 41.78, 62.64 and 26.66 is: 39.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.78 : 62.64 = 26.66 : x
  2. Step 2: Convert to fraction form
    41.78/62.64 = 26.66/x
  3. Step 3: Cross multiply
    41.78x = 62.64 × 26.66
  4. Step 4: Simplify right side
    41.78x = 1,669.98
  5. Step 5: Solve for x
    x = 1,669.98/41.78
  6. Step 6: Final answer
    x = 39.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.